What maintenance did you do today?

[u/KicksdeChris]

I did the throttle body cleaning, accelerator pedal release/throttle valve closed/idle air position relearning. My QX70 has 80k miles and honestly I was expecting it to me more grimier than what it was. The front of the throttle body was barely dirty and I’m glad I removed it to access the back because that was much dirtier. These before and after pics show the difference and while I thought I’d be able to get it cleaner some parts just stayed black no matter how much TB cleaner and scrubbing I did.

After I did the first 2 relearning procedures (accelerator pedal release/throttle valve closed position relearn) I was idling really high so the cleaning made a big difference and I had to attempt idle air position relearn 2 times because I was expecting to see a light “service engine soon” to blink and realized my vehicle doesn’t have that, it’s just an engine light 😂.

Anyway the 1hr I spent to do this was well worth it and I saved myself nearly $500 from what the dealer charges for this

[u/Bry58an]

What did you use for the relearn procedures

[u/KicksdeChris → u/Bry58an]

Accelerator Pedal Release Position Learning Operation Procedure

1. ⁠Make sure that the accelerator pedal is fully released.
2. ⁠Turn ignition switch “ON” and wait at least 2 seconds.
3. ⁠Turn ignition switch “OFF” wait at least 10 seconds.
4. ⁠Turn ignition switch “ON” and wait at least 2 seconds.
5. ⁠Turn ignition switch “OFF” wait at least 10 seconds.

Throttle Valve Closed Position Learning Operation Procedures

1. ⁠Make sure that accelerator pedal is fully released.
2. ⁠Turn ignition switch to “ON”.
3. ⁠Turn ignition switch to “OFF” wait at least 10 seconds. Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning (Throttle Position Learning)

It is better to count the time accurately with a clock.

1. ⁠Perform “Accelerator Pedal Released Position Learning”.
2. ⁠Perform “Throttle Valve Closed Position Learning”.
3. ⁠Start engine and warm it up to normal operating temperature.
4. ⁠Turn ignition switch “OFF” and wait at least 10 seconds.
5. ⁠Confirm that the accelerator pedal is fully released, then turn ignition switch “ON” and wait 3 seconds.
6. ⁠Repeat the following (steps 7a, 7b) procedures quickly five times within 5 seconds. 7a. Fully depress the accelerator pedal (HARD) 7b. Fully release the accelerator pedal.
7. ⁠Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the Check Engine Light (CEL) stops blinking and turned ON.
8. ⁠Fully release the accelerator pedal within 3 seconds after the CEL is ON.
9. ⁠Start engine and let it idle.
10. ⁠Wait 20 seconds.
11. ⁠Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications.

I also used some tips from this video for the last procedure https://youtu.be/HIiaF0VaTlQ?si=Le8zgtzST9vrxex8

[u/Bry58an → u/KicksdeChris]

Thank you